CNC-machined aluminum top shock limitation for surprise human anatomy made from premium lightweight Swiss 7075 T6 aluminum. Ebony color. Few 2. the top of aluminum restriction features significantly vent starting that creates shock construction extremely predictable and simple, since additional shock oil will escape through this vent opening ensuring simply the proper amount of the oil is within the surprise construction. Machined interior ridges confirm appropriate placement and sealing of super-soft silicone membrane layer layer.